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In the above code, we use three functions, order500, order200, orderNormal to handle its own business logic, If the current own function cannot handle things, We pass it to the following function to handle it. By analogy, Until there is a function that can handle him, Otherwise, the responsibility chain mode will leave the chain directly, telling that it cannot be processed and throwing an error prompt. Although the above code can be used as the responsibility chain mode, we can see from the above code that the Order500 function depends on functions such as Order200, so there must be this function, which also violates the open-closed principle in object-oriented. Let's continue to understand writing flexible and detachable responsibility chain nodes.　　甚至到了最后，连案件最初的本源都迷失了。一本正经？恐怕到了这个法庭也没法继续绷住脸孔了……Introducing modules into Node.js: Everything you need to know is here.天亮之后，这个临时的落脚点，剩下一片血红，满地死尸。讲述了一个母胎solo的现代三流女作家，因为意外进入到自己未完成的小说中，成为了自己笔下的一位心机女——一个嚣张跋扈，但并不重要的女配钱溱溱。为了改变自己在小说中的炮灰命运，她联合小说中的男三号——她贴身小助理陆离开始了他们的配角逆袭之旅，并成功收获了爱情。然而，当小说走向结局时，女作家却要回归现实，这场跨越时空的爱情是否会无疾而终呢？　　[No Ring 365 Extreme Challenge Training Camp, Week 7, Day 1]